由进食引导能量额外增加的现象称为()
A、应激反应
B、食物热效应
C、基础代谢
D、条件反射
参考答案:B
—________ you play the piano for us?
—Sorry, I can't play the piano, but I can sing for you.
A.Can
B.Must
C.May
D.Should
简述信息时代设计的基本特点。